Blasting cartridge



E. ORMSBY BLASTING CARTRIDGE' Filed June 21, 1928 May 6, 1930.

Patented May 6, 1930 UNITED STATES PATENT OFFHCE ERLE ORMSBY, OF ST. LOUIS, MISSOURI, ASSIGNOR TO CENTRAL MINE EQUIPMENT vCOMPANY, F ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI BLASTING CARTRIDGE Application led June 21,

This invention relates to blasting cartridges of the type designed and adapted for use in mining operations.

An object of the invention is to provide an improved blasting cartridge closed at one end and having its opposite end open, the eXplosive forces being directed through vthe open end of the cartridge.

Another object of the invention isto provide a cartridge of the type and construction mentioned having means in connection with the open end thereof for directing laterally or in an angular direction a part of the eX- plosive forces.

Other objects will appear from the following description, reference being made to the drawing in which Figs. l and 2 are side and end elevations, respectively, of a cartridge having one end closed and the opposite end open for directing the explosive forces mainly longitudinally from the cartridge. n

Figs. 3 and 4 are side and end elevations, respectively, of a cartridge of the type shown in Figs. 1 and 2 and having a closed end of dierent form.

Figs. 5 and 6 are side and end elevations, respectively, of a cartridge having the open end formed on an incline entirely across the cartridge.

Figs. 7 and 8 are side and end elevations,

respectively, of a cartridge having its open end in the form of a wedge.

' Figs. 9 and 10 are side and end elevations, respectively, of a cartridge having a notch of about one hundred eighty degrees cut in one side of theopen end.

Figs. 11 and 12 are side and end elevations, respectively, of a cartridge having a no tch of about ninety degrees formed in one side of the open end. Y

Figs. 13 and-14 are side and end elevations, respectively, of a cartridge having a pair of diametrically opposite notches formed in its open end. Y Y

Each of the cartridges shown in Figs. 1, and 5 to 13, inclusive, comprises a tubular shell 1 having one end open and an integral wall 2 closing the opposite end. The cartridges of Figs. 5 to 13, inclusive, have means 1928. Serial No. 287,160.

in connection with the walls 2 for engagement with a tool or implement, grooves 3 being shown for such purpose whereby the cartridges may be turned to direct the eX- plosive forces in different directions. The cartridges of Figs. 1, 5, 9 and 11 have holes 4 through the end walls 2 and the cartridges of Figs. 7 and 13 have radial holes 5. These holes 4 and 5 are designed and adapted to receive a wire or fuse for use in exploding the explosive contents of the cartridges when the cartridges are in use.

The cartridge of Figs. 3 and 4 comprises a tubular shell 6 having one end open and having a longitudinal tapered end forming a closure for the opposite end. A hole 8 opens through the wall of the shell 6 to receive a wire or fuse for exploding the explosives contained in the shell.

The open ends of the cartridge of Figs. 1 and 3 are diametric so that the explosive forces are directed longitudinally.

, The open end of the shell of Figs. 5 and 6 is formed in an oblique or inclined plane, thus providing at Yone side of the shell an extension 9, the edge of which inclines to intersection with the diametrically opposite side of the shell. This form of shell directs the explosive forces longitudinally, and also angularly from the extension 9. The groove 3 in the outer end wall 2 of this shell cooperates with the hole 4 to indicate to the workman the lateral direction to which the inner end of the shell-opens. For the hole 4 is longitudinally opposite the extension 9, being between the groove 3 and the side of the shell whichk is elongated by said eXtension 9. Accordingly, the workman, knowing this arrangement, is informed thereby to which lateral direction the inner end of the shell opens.

The shell of Figs. 7 and 8 has its open end provided with two diametrically opposite intersecting bevels forming two diametrically opposite pointed extensions 10 which permit longitudinal and lateral diverging direction of the explosive forces. That is, the eX- plosive forces proceed longitudinally and diverge in diametrically opposite directions. In this form of the invention thegroove 3 is in longitudinal alinement with the pointed extensions 10. The workman, knowing this arrangement, is thereby informed in which lateral directions the inner end of the shell opens.

The shell of Figs. 9 and 10 is shaped to provide a notch 11 in its open end extending about one hundred eighty degrees circumferentially and providing an overhanging shell portion 12. By this type of shell the explosive forces are directed longitudinally and angularly and spread to a greater extent than the explosive forces proceeding from the shell of Fig. 5. T he extended portion 12 of this shell is approximately semi-tubular so that the explosive forces may spread radially in opposite directions across the radial edges of the extended portion 12, whereas this effect is not obtained by the shell of Fig. 5.

The shell of Figs. 11 and 12 has in its open end a notch 13 extending about ninety degrees circumferentially and leaving an extended shell portion 11i extending about three-fourths of the circumference of the Y complete shell. This type of shell directs the `extended shell portion 14. The workman,

knowing this fact, is thereby informed in which lateral direction the inner end of the shell opensand is enabled to adjust the shell as desired.

The shell of Figs. 13 and 14 has its open end formed with a pair of diametrically opposite notches 15 providing a pair of diametrically opposite extended portions 16 'which function to permit passage of the explosive forces between them. That is, the explosive forces may be directed angularly through the notches 15 but are otherwise prevented from spreading until the explosive forces pass beyond the extremities of said extensions 16. The groove 3 intersects the peripheral edge of the shell in alinement with the notches 15 so that the workman, knowing this construction, is enabled to adjust the shell to direct the openings laterally in the i directions desired.

It will be observed that the groove 3in all of these shells in which it lis provided, is in the end wall of the shell and permits engagement therewith by a device extended longitudinally into the -hole in which the shell is mounted and engaged with the shell and operated to turn the shell to the desired adjustment in which the inner end of the shell opens laterally in the desired direction or directions, and that this groove 3 ithenpermits longitudinal withdrawal of said device from engagement with the shell and from the hole in which the shell is mounted.

Other forms and variations of the shell may be devised for directing the explosive forces Without departure from the nature and principle of the invention.

I do not restrict myself unessentially, but what l: claim and desire to secure by Letters Patentis 1. A blasting cartridge for insertion in a hole in the mineral to be blasted, comprising a tubular shell having its inner end opening longitudinally and laterally, and means in connection with the outer end of the shell for engagement with the inner end of a device extended l-ongitudinally into the hole in which the shell is mounted for turning the shell to adjusted posi-tions in the hole and permitting outward longitudinal withdrawal of said device from engagement with said shell and from the hole in which the shell is mounted.

2. A blasting cartridge for insertion in a hole in the mineral to be blasted, comprising a tubular shell of approximately uniform diameter a-nd having an approximately smooth outer surface and having its inner end opening longitudinally and laterally, and means in connection with the outer-end of the shell for engagement with the end of a device extended longitudinally into the hole in which the shell is mounted for turning the shell Vand permitting said device to be withdrawn longitudinally from the hole in which the shell is mounted, and said shell having a hole open ing therethrough adjacent to said means for admitting an ignition device.

3. A blasting cartridge for insertion in a hole in the mineral to be blasted, comprising a tubular shell having its inner end open, a j i wall closing the outer end of said shell, and means in connection with said wall for engagement with a device extended longitudinally into the hole in which the shell is mounted for turning the shell and permitting said 'device to be withdrawn longitudinally from the hole and from engagement with the shell.

4. A blasting cartridge for insertion in a hole in the mineral to be blasted, comprising a tubular shell having its inner end opening longitudinally and laterally, la wall closing the outer end of the shell, and means in connection with said wall for engagement with the end of a device extended longitudinally into the hole in which the shell is mounted for turning the shell and permitting longitudinal withdrawal of said device from engagement with the shell and ,from said hole and indicating the lateral direction to which the inner end of said shell opens.

ERLE ORMSBY. 

